I've got a new Pi Zero set up as a remote security camera which uploads to Google Drive. At the moment, it's not responding through the browser, or through ssh. ssh just sits there... no errors or anything. ssh -vvv says that a connection is established. If I ping it from another Pi on the network, the responses vary from 5ms to 200+ms which might imply that it's doing some processing.
If it records a long video, it converts it to mp4 so it's working quite hard.
What I'm wondering is whether there is any nmap type command to see if it's actually alive and just really busy or whether the ping is a red herring and the OS is dead. I don't want to pull the plug on it if it's just processing video as whatever is there will be lost.